JPH0813077B2 - Thermal recording device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-sensitive recording device for making a hard copy of a television image or the like onto recording paper.

2. Description of the Related Art When performing color recording, cyan, magenta, and yellow, which are the primary colors of color recording, are used, one screen is recorded with cyan of the first color, and then the second and third colors of the first color are recorded. It is common to do it on the record. When this method is used, it is necessary to align the recordings of three colors on the image receiving paper so that there is no deviation. Therefore, in order to eliminate this color shift, the image receiving paper is brought into close contact with a drum having a peripheral length substantially corresponding to the length of the image receiving paper, the drum is rotated three times, and one color is recorded for each rotation. The recording position is controlled by controlling the rotational position of the drum. For that purpose, it is necessary to wind the image receiving paper around the drum. For that purpose, it is necessary to firmly hold the front end of the image receiving paper by the holder 1 as shown in FIG. A conventional thermal transfer type color recording apparatus is shown in plan view a and side view b in FIG. In FIG. 2, 2 is a drum, 3 is an image receiving paper, 4 is a recording head, and 5 is a thermal transfer paper. 6 is a paper detection sensor for detecting the leading edge of the image receiving paper. The paper detection sensor 6 is located at the center of the width of the paper.
When the image receiving paper 3 is positioned at the individual position, the leading edge is recognized by the paper detection sensor 6 when the holder 1 is driven, and the image receiving paper 3 is held by the holder 1 (for example, Japanese Patent Application No.
58-36182).

Problems to be Solved by the Invention However, in the configuration of the conventional example, since only one paper detection sensor is installed in the substantially central portion of the paper width, even when the image receiving paper is slanted, it is the same as in the normal state. Since the paper is detected and recorded diagonally, or the paper with a width narrower than the recording area is detected and recording is performed, there are problems such as missing recording and damage to the drum due to direct transfer to the drum. Therefore, when the image receiving paper is oblique or when the paper size is small, it is necessary to make a configuration that does not detect the image receiving paper.

The present invention has been made in view of the above-mentioned problems, and when the image receiving paper is inserted, the image receiving paper having a sufficient recording area is fixed straight at a predetermined position and then the next operation is performed, so that the above-mentioned malfunction occurs. It is an object of the present invention to provide a heat-sensitive recording device that does not generate heat.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a pair of paper detection sensors at least at positions outside both ends of a recording area recorded on an image receiving paper by a recording head, and inserts the image receiving paper. Sometimes, the pair of paper detection sensors detect the front end of the image receiving paper to determine that the front end is slanted, and the image receiving paper has a recording width to be recorded by the recording head. Is detected and recorded reliably.

With the above-described structure, the present invention makes it possible to detect the leading edge of the image-receiving sheet when the image-receiving sheet is inserted and to detect the leading edge reliably, without causing a malfunction such as diagonal recording, and having a sufficient width for recording. Are confirmed and recorded reliably.

EXAMPLE FIG. 1 shows a plan view a and a side view b of an embodiment of the thermal recording apparatus of the present invention. In FIG. 1, 7 is a holder, 8 is a drum, W is a recording area, 9 is a receiving paper, and 10 and 11 are receiving papers 9.
In, the paper detection sensor is located outside the recording area W and inside the paper size, and is located near the drum. Next, the operation of the embodiment will be described. When the image receiving paper 9 is inserted, the both paper detecting sensors 10 and 11 must be passed through. After the detection by the both paper detecting sensors 10 and 11, the holder 7 is driven and the front end of the image receiving paper 9 is held. Receiving paper 9 held by 7
Is recorded by being wound and pressed on the circumference of the drum. At this time, since the image receiving paper 9 has passed through the pair of paper detection sensors located at least outside both ends of the recording area W,
Neither the image receiving paper is obliquely inserted nor the image receiving paper having a width narrower than the recording area is detected. Regarding the operation after recording, the image receiving paper 9 is carried into the position where the image receiving paper is inserted through both the paper detection sensors 10 and 11, and the holder 7 releases the holding of the image receiving paper at the detection. In this embodiment, two paper detection sensors have been described, but when processing a plurality of types of paper, the same effect can be obtained by providing a paper detection sensor according to the types, Therefore, the number is not limited to two.

EFFECTS OF THE INVENTION As described above, according to the present invention, when the image receiving paper is inserted, the image receiving paper is fixed obliquely by the holder and is not rolled up obliquely, and the image receiving paper having a width narrower than the recording area is provided. It is possible to realize the operation of holding the cartridge and fixing it by the holder only when it is correctly inserted in the predetermined position without causing the malfunction of performing the recording operation.

[Brief description of drawings]

FIG. 1 is a schematic diagram of the constitution of a thermal recording apparatus according to an embodiment of the present invention, a is a plan view, b is a side view, and FIG. 2 is a schematic diagram of the configuration of a thermal recording apparatus in a conventional example, a is a plan view, b Is a side view. 7 ... Holder, 8 ... Drum, 9 ... Image receiving paper, 10, 11 ...
... Paper detection sensor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-5556 (JP, A) Actually opened 54-146118 (JP, U) Actually opened 57-202250 (JP, U)

Claims (1)

[Claims] 1. An image receiving paper, a drum around which the image receiving paper is wound, at least one pair of detecting means installed at a predetermined position for detecting the leading edge of the image receiving paper, and the detecting means for detecting the image receiving paper. And a paper holder that holds the front end of the image receiving paper in the drum, and presses the image receiving paper in the drum.
A recording head that performs recording while rotating the drum, and the detecting means is provided so as to be located at least outside both ends of the recording area of the head and in the vicinity of the recording area. Characteristic thermal recording device.